doNotation1.lean:4:0-4:6: error: 'y' cannot be reassigned
doNotation1.lean:8:2-8:18: error: 'y' cannot be reassigned
doNotation1.lean:12:2-12:17: error: 'p' cannot be reassigned
doNotation1.lean:20:7-20:22: error: invalid reassignment, value has type
  Vector Nat (n + 1) : Type
but is expected to have type
  Vector Nat n : Type
doNotation1.lean:25:7-25:11: error: invalid reassignment, value has type
  Bool : Type
but is expected to have type
  Nat : Type
doNotation1.lean:24:0-25:11: error: type mismatch, 'for' has type
  PUnit : Sort ?u
but is expected to have type
  List Bool : Type
doNotation1.lean:28:0-29:14: error: type mismatch, 'for' has type
  PUnit : Sort ?u
but is expected to have type
  List Nat : Type
doNotation1.lean:33:2-33:7: error: invalid 'do' element, it must be inside 'for'
doNotation1.lean:37:2-37:10: error: invalid 'do' element, it must be inside 'for'
doNotation1.lean:40:0-40:9: error: must be last element in a 'do' sequence
def f10 : Nat → IO Unit :=
fun (x : Nat) => IO.println x
doNotation1.lean:51:0-51:13: error: type mismatch
  IO.mkRef true
has type
  EIO IO.Error (IO.Ref Bool) : Type
but is expected to have type
  EIO IO.Error Unit : Type
doNotation1.lean:58:2-58:20: error: type mismatch, result value has type
  Unit : Type
but is expected to have type
  Bool : Type
doNotation1.lean:66:0-66:18: error: 'do' element is unreachable
doNotation1.lean:70:0-70:32: error: 'do' element is unreachable